blob: 4c985c3615219d88dad1d69667f4a8c02e778b27 [file] [log] [blame]
/*
* Copyright (c) 2018, NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_imx_mu
#include <errno.h>
#include <string.h>
#include <zephyr/device.h>
#include <soc.h>
#include <zephyr/drivers/ipm.h>
#include <zephyr/irq.h>
#if IS_ENABLED(CONFIG_IPM_IMX_REV2)
#include "fsl_mu.h"
#else
#include <mu_imx.h>
#endif
#define MU(config) ((MU_Type *)config->base)
#if ((CONFIG_IPM_IMX_MAX_DATA_SIZE % 4) != 0)
#error CONFIG_IPM_IMX_MAX_DATA_SIZE is invalid
#endif
#define IMX_IPM_DATA_REGS (CONFIG_IPM_IMX_MAX_DATA_SIZE / 4)
struct imx_mu_config {
MU_Type *base;
void (*irq_config_func)(const struct device *dev);
};
struct imx_mu_data {
ipm_callback_t callback;
void *user_data;
};
#if IS_ENABLED(CONFIG_IPM_IMX_REV2)
/*!
* @brief Check RX full status.
*
* This function checks the specific receive register full status.
*
* @param base Register base address for the module.
* @param index RX register index to check.
* @retval true RX register is full.
* @retval false RX register is not full.
*/
static inline bool MU_IsRxFull(MU_Type *base, uint32_t index)
{
switch (index) {
case 0:
return (bool)(MU_GetStatusFlags(base) & kMU_Rx0FullFlag);
case 1:
return (bool)(MU_GetStatusFlags(base) & kMU_Rx1FullFlag);
case 2:
return (bool)(MU_GetStatusFlags(base) & kMU_Rx2FullFlag);
case 3:
return (bool)(MU_GetStatusFlags(base) & kMU_Rx3FullFlag);
default:
/* This shouldn't happen */
assert(false);
return false;
}
}
/*!
* @brief Check TX empty status.
*
* This function checks the specific transmit register empty status.
*
* @param base Register base address for the module.
* @param index TX register index to check.
* @retval true TX register is empty.
* @retval false TX register is not empty.
*/
static inline bool MU_IsTxEmpty(MU_Type *base, uint32_t index)
{
switch (index) {
case 0:
return (bool)(MU_GetStatusFlags(base) & kMU_Tx0EmptyFlag);
case 1:
return (bool)(MU_GetStatusFlags(base) & kMU_Tx1EmptyFlag);
case 2:
return (bool)(MU_GetStatusFlags(base) & kMU_Tx2EmptyFlag);
case 3:
return (bool)(MU_GetStatusFlags(base) & kMU_Tx3EmptyFlag);
default:
/* This shouldn't happen */
assert(false);
return false;
}
}
#endif
static void imx_mu_isr(const struct device *dev)
{
const struct imx_mu_config *config = dev->config;
MU_Type *base = MU(config);
struct imx_mu_data *data = dev->data;
uint32_t data32[IMX_IPM_DATA_REGS];
uint32_t status_reg;
int32_t id;
int32_t i;
bool all_registers_full;
status_reg = base->SR >>= MU_SR_RFn_SHIFT;
for (id = CONFIG_IPM_IMX_MAX_ID_VAL; id >= 0; id--) {
if (status_reg & 0x1U) {
/*
* Check if all receive registers are full. If not,
* it is violation of the protocol (status register
* are set earlier than all receive registers).
* Do not read any of the registers in such situation.
*/
all_registers_full = true;
for (i = 0; i < IMX_IPM_DATA_REGS; i++) {
if (!MU_IsRxFull(base,
(id * IMX_IPM_DATA_REGS) + i)) {
all_registers_full = false;
break;
}
}
if (all_registers_full) {
for (i = 0; i < IMX_IPM_DATA_REGS; i++) {
#if IS_ENABLED(CONFIG_IPM_IMX_REV2)
data32[i] = MU_ReceiveMsg(base,
(id * IMX_IPM_DATA_REGS) + i);
#else
MU_ReceiveMsg(base,
(id * IMX_IPM_DATA_REGS) + i,
&data32[i]);
#endif
}
if (data->callback) {
data->callback(dev, data->user_data,
(uint32_t)id,
&data32[0]);
}
}
}
status_reg >>= IMX_IPM_DATA_REGS;
}
/* Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F
* Store immediate overlapping exception return operation
* might vector to incorrect interrupt. For Cortex-M7, if
* core speed much faster than peripheral register write
* speed, the peripheral interrupt flags may be still set
* after exiting ISR, this results to the same error similar
* with errata 838869.
*/
#if (defined __CORTEX_M) && ((__CORTEX_M == 4U) || (__CORTEX_M == 7U))
__DSB();
#endif
}
static int imx_mu_ipm_send(const struct device *dev, int wait, uint32_t id,
const void *data, int size)
{
const struct imx_mu_config *config = dev->config;
MU_Type *base = MU(config);
uint32_t data32[IMX_IPM_DATA_REGS];
#if !IS_ENABLED(CONFIG_IPM_IMX_REV2)
mu_status_t status;
#endif
int i;
if (id > CONFIG_IPM_IMX_MAX_ID_VAL) {
return -EINVAL;
}
if (size > CONFIG_IPM_IMX_MAX_DATA_SIZE) {
return -EMSGSIZE;
}
/* Actual message is passing using 32 bits registers */
memcpy(data32, data, size);
#if IS_ENABLED(CONFIG_IPM_IMX_REV2)
if (wait) {
for (i = 0; i < IMX_IPM_DATA_REGS; i++) {
MU_SendMsgNonBlocking(base, id * IMX_IPM_DATA_REGS + i,
data32[i]);
}
while (!MU_IsTxEmpty(base,
(id * IMX_IPM_DATA_REGS) + IMX_IPM_DATA_REGS - 1)) {
}
} else {
for (i = 0; i < IMX_IPM_DATA_REGS; i++) {
if (MU_IsTxEmpty(base, id * IMX_IPM_DATA_REGS + i)) {
MU_SendMsg(base, id * IMX_IPM_DATA_REGS + i,
data32[i]);
} else {
return -EBUSY;
}
}
}
#else
for (i = 0; i < IMX_IPM_DATA_REGS; i++) {
status = MU_TrySendMsg(base, id * IMX_IPM_DATA_REGS + i,
data32[i]);
if (status == kStatus_MU_TxNotEmpty) {
return -EBUSY;
}
}
if (wait) {
while (!MU_IsTxEmpty(base,
(id * IMX_IPM_DATA_REGS) + IMX_IPM_DATA_REGS - 1)) {
}
}
#endif
return 0;
}
static int imx_mu_ipm_max_data_size_get(const struct device *dev)
{
ARG_UNUSED(dev);
return CONFIG_IPM_IMX_MAX_DATA_SIZE;
}
static uint32_t imx_mu_ipm_max_id_val_get(const struct device *dev)
{
ARG_UNUSED(dev);
return CONFIG_IPM_IMX_MAX_ID_VAL;
}
static void imx_mu_ipm_register_callback(const struct device *dev,
ipm_callback_t cb,
void *user_data)
{
struct imx_mu_data *driver_data = dev->data;
driver_data->callback = cb;
driver_data->user_data = user_data;
}
static int imx_mu_ipm_set_enabled(const struct device *dev, int enable)
{
const struct imx_mu_config *config = dev->config;
MU_Type *base = MU(config);
#if IS_ENABLED(CONFIG_IPM_IMX_REV2)
#if CONFIG_IPM_IMX_MAX_DATA_SIZE_4
if (enable) {
MU_EnableInterrupts(base, kMU_Rx0FullInterruptEnable);
MU_EnableInterrupts(base, kMU_Rx1FullInterruptEnable);
MU_EnableInterrupts(base, kMU_Rx2FullInterruptEnable);
MU_EnableInterrupts(base, kMU_Rx3FullInterruptEnable);
} else {
MU_DisableInterrupts(base, kMU_Rx0FullInterruptEnable);
MU_DisableInterrupts(base, kMU_Rx1FullInterruptEnable);
MU_DisableInterrupts(base, kMU_Rx2FullInterruptEnable);
MU_DisableInterrupts(base, kMU_Rx3FullInterruptEnable);
}
#elif CONFIG_IPM_IMX_MAX_DATA_SIZE_8
if (enable) {
MU_EnableInterrupts(base, kMU_Rx1FullInterruptEnable);
MU_EnableInterrupts(base, kMU_Rx3FullInterruptEnable);
} else {
MU_DisableInterrupts(base, kMU_Rx1FullInterruptEnable);
MU_DisableInterrupts(base, kMU_Rx3FullInterruptEnable);
}
#elif CONFIG_IPM_IMX_MAX_DATA_SIZE_16
if (enable) {
MU_EnableInterrupts(base, kMU_Rx3FullInterruptEnable);
} else {
MU_DisableInterrupts(base, kMU_Rx3FullInterruptEnable);
}
#else
#error "CONFIG_IPM_IMX_MAX_DATA_SIZE_n is not set"
#endif
#else
#if CONFIG_IPM_IMX_MAX_DATA_SIZE_4
if (enable) {
MU_EnableRxFullInt(base, 0U);
MU_EnableRxFullInt(base, 1U);
MU_EnableRxFullInt(base, 2U);
MU_EnableRxFullInt(base, 3U);
} else {
MU_DisableRxFullInt(base, 0U);
MU_DisableRxFullInt(base, 1U);
MU_DisableRxFullInt(base, 2U);
MU_DisableRxFullInt(base, 3U);
}
#elif CONFIG_IPM_IMX_MAX_DATA_SIZE_8
if (enable) {
MU_EnableRxFullInt(base, 1U);
MU_EnableRxFullInt(base, 3U);
} else {
MU_DisableRxFullInt(base, 1U);
MU_DisableRxFullInt(base, 3U);
}
#elif CONFIG_IPM_IMX_MAX_DATA_SIZE_16
if (enable) {
MU_EnableRxFullInt(base, 3U);
} else {
MU_DisableRxFullInt(base, 3U);
}
#else
#error "CONFIG_IPM_IMX_MAX_DATA_SIZE_n is not set"
#endif
#endif
return 0;
}
static int imx_mu_init(const struct device *dev)
{
const struct imx_mu_config *config = dev->config;
MU_Init(MU(config));
config->irq_config_func(dev);
return 0;
}
static const struct ipm_driver_api imx_mu_driver_api = {
.send = imx_mu_ipm_send,
.register_callback = imx_mu_ipm_register_callback,
.max_data_size_get = imx_mu_ipm_max_data_size_get,
.max_id_val_get = imx_mu_ipm_max_id_val_get,
.set_enabled = imx_mu_ipm_set_enabled
};
/* Config MU */
static void imx_mu_config_func_b(const struct device *dev);
static const struct imx_mu_config imx_mu_b_config = {
.base = (MU_Type *)DT_INST_REG_ADDR(0),
.irq_config_func = imx_mu_config_func_b,
};
static struct imx_mu_data imx_mu_b_data;
DEVICE_DT_INST_DEFINE(0,
&imx_mu_init,
NULL,
&imx_mu_b_data, &imx_mu_b_config,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
&imx_mu_driver_api);
static void imx_mu_config_func_b(const struct device *dev)
{
IRQ_CONNECT(DT_INST_IRQN(0),
DT_INST_IRQ(0, priority),
imx_mu_isr, DEVICE_DT_INST_GET(0), 0);
irq_enable(DT_INST_IRQN(0));
}